flutter记录

1.按钮禁止重复点击
给响应函数加个判断，点击无效时为null。

onPressed: () {
                    if (_isTesting == 0) {
                      _testStatus = 0;
                      _isTesting = 1;
                      getHttp();
                    } else {
                      null;
                    }

2.特殊图标
引入库

  font_awesome_flutter: ">=8.10.0"

导入使用

import 'package:font_awesome_flutter/font_awesome_flutter.dart';


IconButton(
      // Use the FaIcon Widget + FontAwesomeIcons class for the IconData
      icon: FaIcon(FontAwesomeIcons.mailBulk), 
      onPressed: () { print("Pressed"); }
     )